The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1981
Filed:
Jul. 06, 1979
Richard A Nickola, Highland, IN (US);
Inland Steel Company, Chicago, IL (US);
Abstract
A process of hot-dip coating a strip of cold rolled low carbon steel having as an essential alloying element at least one strong oxide forming metal, such as titanium, aluminum, silicon or chromium or a combination thereof, to overcome the difficulty of uniformly hot-dip coating such steels with aluminum and other protective metals on a Sendzimir-type hot-dip coating line wherein the steel strip is thoroughly cleaned by washing in an alkaline cleaning solution, brushing and drying to remove metallic particles and non-metallic contaminants, forming a dry film coating on a clean dry surface of the strip of a higher fatty acid amide having from 8 to 18 carbon atoms, heating said strip to a temperature sufficient to completely volatilize said amide film coating, passing said strip through a heating zone containing a reducing atmosphere in which the strip is heated to a temperature of at least about 704.degree. C. (1300.degree. F.), cooling said strip in a reducing atmosphere to about the temperature of a molten aluminum hot-dip coating bath, and passing said strip through said hot-dip coating bath. The amide coated steel strip has excellent corrosion resistance when stored in coiled form and is adapted for uniform hot-dip coating with aluminum on a Sendzimir-type hot-dip coating line.